21303001010303 has 2 divisors, whose sum is σ = 21303001010304. Its totient is φ = 21303001010302.

The previous prime is 21303001010233. The next prime is 21303001010309. The reversal of 21303001010303 is 30301010030312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21303001010303 - 2⁸ = 21303001010047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21303001010309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651500505151 + 10651500505152.

It is an arithmetic number, because the mean of its divisors is an integer number (10651500505152).

Almost surely, 2^{21303001010303} is an apocalyptic number.

21303001010303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303001010303 is an equidigital number, since it uses as much as digits as its factorization.

21303001010303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21303001010303 its reverse (30301010030312), we get a palindrome (51604011040615).

The spelling of 21303001010303 in words is "twenty-one trillion, three hundred three billion, one million, ten thousand, three hundred three".